# Urinary Tract Infection Caused by Lactococcus garvieae in a 75-Year-Old Male Patient With a Complex Medical History

## TL;DR

A 75-year-old man with a complex medical history was successfully treated for a rare urinary tract infection caused by Lactococcus garvieae.

## Contribution

This case report highlights the clinical management and awareness of Lactococcus garvieae as a rare human pathogen.

## Key findings

- Lactococcus garvieae caused a urinary tract infection in a 75-year-old male with pyohydronephrosis.
- Successful treatment involved intravenous ampicillin/sulbactam followed by oral linezolid.
- The report emphasizes the need for increased awareness of L. garvieae as a potential human pathogen.

## Abstract

Lactococcus garvieae, a Gram-positive bacterium traditionally associated with infections in fish, has been increasingly recognized as a rare pathogen in human infections, including urinary tract infections (UTIs). We present a case of a 75-year-old male patient with pyohydronephrosis and a complex medical history who was diagnosed with a UTI caused by L. garvieae. The patient was successfully treated with a combination of intravenous ampicillin/sulbactam followed by oral linezolid, resulting in the resolution of symptoms. This report also compares this case with other documented cases of L. garvieae infections, highlighting its pathogenic mechanisms, clinical manifestations, treatment strategies, and the need for heightened awareness of this pathogen.